Add an IPC channel between the NaCl loader process and the renderer.

chrome/nacl/nacl_listener.h

Index: chrome/nacl/nacl_listener.h
===================================================================
--- chrome/nacl/nacl_listener.h	(revision 136022)
+++ chrome/nacl/nacl_listener.h	(working copy)
@@ -12,6 +12,7 @@
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "chrome/common/nacl_types.h"
+#include "chrome/nacl/nacl_ipc_manager.h"
 #include "ipc/ipc_channel.h"
 
 namespace IPC {
@@ -47,6 +48,9 @@
   // Used to identify what thread we're on.
   MessageLoop* main_loop_;
 
+  NaClIPCManager nacl_ipc_manager_;
+  void* nacl_ppapi_channel_;
+
   bool debug_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClListener);